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A123970 as a simple table

na(n)
01
11
2-1
31
4-3
51
61
7-6
85
9-1
101
11-10
1215
13-7
141
151
16-15
1735
18-28
199
20-1
211
22-21
2370
24-84
2545
26-11
271
281
29-28
30126
31-210
32165
33-66
3413
35-1
361
37-36
38210
39-462
40495
41-286
4291
43-15
441
451
46-45
47330
48-924
491287
50-1001
51455
52-120
5317
54-1
551
56-55
57495
58-1716
593003
60-3003
611820
62-680
63153
64-19
651
661
67-66
68715
69-3003
706435
71-8008

[1,1,-1,1,-3,1,1,-6,5,-1,1,-10,15,-7,1,1,-15,35,
 -28,9,-1,1,-21,70,-84,45,-11,1,1,-28,126,-210,165,
 -66,13,-1,1,-36,210,-462,495,-286,91,-15,1,1,-45,
 330,-924,1287,-1001,455,-120,17,-1,1,-55,495,
 -1716,3003,-3003,1820,-680,153,-19,1,1,-66,715,
 -3003,6435,-8008]